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ZnO/reduced graphene oxide/polypyrrole ternary composite material preparation method, and application of the ternary composite material

A composite material and ternary composite technology, applied in electrical components, hybrid capacitor electrodes, electrolytic capacitors, etc., can solve the problems of poor capacity ratio and stability, poor cycle performance, low specific capacitance, etc., and achieve enhanced capacitance performance, The effect of low cost and high energy density

Inactive Publication Date: 2012-07-04
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon materials have the advantages of wide potential window, high power density, good cycle stability and low cost, but their specific capacitance is low; transition metal oxides usually have high specific capacitance, but their capacity ratio and stability are poor and cost High; while the electrical activity of conductive polymers is high, but poor cycle performance is its Achilles' heel

Method used

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  • ZnO/reduced graphene oxide/polypyrrole ternary composite material preparation method, and application of the ternary composite material
  • ZnO/reduced graphene oxide/polypyrrole ternary composite material preparation method, and application of the ternary composite material
  • ZnO/reduced graphene oxide/polypyrrole ternary composite material preparation method, and application of the ternary composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of GO

[0040] a. Take 92mL of concentrated sulfuric acid and place it in an ice-water bath, lower the temperature to 0-5°C, slowly add 4g of natural graphite and 2g of anhydrous sodium nitrate, and continue stirring for 30min.

[0041] b. Add 13 g of potassium permanganate to the above mixed solution, maintain the ice bath for 1 h, take the mixed solution out of the ice bath, stir at room temperature for 3 h, and add 180 mL of water dropwise, and stir for 20 min.

[0042] c. Continue to add 560mL water to the mixed solution, and then add 50mL 30% hydrogen peroxide drop by drop. When the supernatant is colorless, remove the supernatant, then add 560mL water, adjust the pH to 7 with KOH, and remove the supernatant after standing still for 24 hours The solution was filtered with a circulating water vacuum pump, soaked in ethanol, washed with water, and dried in vacuum at 60°C for 24 hours to obtain GO.

[0043] (2) Preparation of ZnO / RGO binary composites...

Embodiment 2

[0055] (1) Preparation of GO: Same as Example 1.

[0056] (2) Preparation of ZnO / RGO binary composite: Same as Example 1.

[0057] (3) Synthesis of ZnO / RGO / PPy ternary composites

[0058] a. Disperse 0.1077g ZnO / RGO into 100mL aqueous solution dissolved with 0.5g cetyltrimethylammonium bromide (CTAB) and sonicate for 2h.

[0059] b. The above dispersion was taken out and placed in an ice-water bath and kept stirring. At the same time, 20 mL of ethanol solution in which 14.4 mmol of Py monomer was dissolved was slowly added and ultrasonicated for 30 min to completely adsorb Py on the ZnO / RGO composite.

[0060] c. Slowly add 30 mL of 14.4 mmol (NH 4 ) 2 S 2 o 8 The aqueous solution was stirred and reacted in an ice bath for 24 hours, filtered, washed, and dried at 60°C to obtain the ZnO / RGO / PPy ternary composite material (A). Among them: the mass ratio of ZnO / RGO to Py monomer is 1:9.

[0061] (4) Fabrication of ZnO / RGO / PPy ternary composite electrodes

[0062] a. Mix t...

Embodiment 3

[0068] (1) Preparation of GO: Same as Example 1.

[0069] (2) Preparation of ZnO / RGO binary composite: Same as Example 1.

[0070] (3) Synthesis of ZnO / RGO / PPy ternary composites

[0071] a. Disperse 0.1038g ZnO / RGO into 100mL aqueous solution dissolved with 0.5g cetyltrimethylammonium bromide (CTAB) and sonicate for 2h.

[0072] b. The above dispersion was taken out and placed in an ice-water bath and kept stirring. At the same time, 20 mL of ethanol solution in which 3.6 mmol of Py monomer was dissolved was slowly added and ultrasonicated for 30 min to completely adsorb Py on the ZnO / RGO composite.

[0073] c. Slowly add 30 mL of 3.6 mmol (NH 4 ) 2 S 2 o 8 Aqueous solution of ZnO / RGO / PPy ternary complex (B) was obtained by stirring in an ice bath for 24 hours, filtering, washing, and drying at 60°C. Among them: the mass ratio of ZnO / RGO to Py monomer is 3:7.

[0074] (4) Fabrication of ZnO / RGO / PPy ternary composite electrode: the method is the same as in Example 2.

...

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Abstract

The invention discloses a zinc oxide (ZnO) / reduced graphene oxide / polypyrrole (ZnO / RGO / PPy) ternary composite material, which belongs to the technical field of composite material. The ZnO / RGO / PPy ternary composite material is prepared by a two-step method, including preparing a uniformly-dispersed binary composite material ZnO / reduced graphene oxide (ZnO / RGO), and polymerizing pyrrole (Py) monomer by chemical oxidation method by using the binary composite material as a template to obtain the ZnO / RGO / PPy ternary composite material. The ZnO / RGO / PPy ternary composite material prepared by the invention has both the electric double layer capacitance characteristics of RGO and pseudocapacitor energy storage characteristics of ZnO and Ppy, so that the composite material can show high electrochemical capacitance behavior, excellent rate capability, good circulation stability, and has high energy densigh and power density, , and can be used as the electrode material of a super capacitor.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a method for preparing a ZnO / reduced graphene oxide / polypyrrole ternary composite material and the prepared ZnO / reduced graphene oxide / polypyrrole ternary composite material as an electrode material for a supercapacitor application. Background technique [0002] With the development of social economy and the strengthening of people's awareness of green energy and ecological environment protection, supercapacitors, as a new type of energy storage device, have attracted more and more attention. It can provide higher energy density than electrostatic capacitors, and is more Batteries have higher power density and longer cycle life, and have a wide range of applications in electric vehicles, communications and industrial fields. The performance of supercapacitors mainly depends on the electrode materials. The electrode materials for supercapacitors currently studied mainly include: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042
CPCY02E60/13H01G11/32
Inventor 胡中爱张海英张富海张亚军梁鹏举
Owner NORTHWEST NORMAL UNIVERSITY
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